Since its completion in 1986, submarines at Barrow are constructed inside the Devonshire Dock Hall (DDH).

The company is currently constructing the Astute-classsubmarine, a new generation nuclear attack submarine (SSN) for the Royal Navy, the first of which was launched on 8 June 2007.[1] The order for the initial batch of three ships was placed in 1997, with Marconi Marine (VSEL), which was absorbed into BAE Systems in 1999. BAE Systems Maritime – Submarines is also currently studying the design of a new class of ballistic missile submarines.